| 摘要 |
PROBLEM TO BE SOLVED: To provide a developer feeding device in which the clogging of developer at the discharge port of the top end part of a developer feeding pipe is easily prevented. SOLUTION: The winding terminal part 51 of a coil-shaped auger 50 is rotated in a state that it is brought into press-contact with the butting terminal surface 45d of the top end part 45 of the developer feeding pipe 40. Also, the aperture size L of the discharge port 44 in a toner feeding direction H at the top end part of the developer feeding pipe 40 is set as equal to or more than one and half times of the winding pitch P of the coil-shaped auger 50. |
